The endorsements match a recent recommendation fromInstitutional Shareholder Services Inc, another leading proxyadvisor, which also backed Pershing's slate for election to CP'sboard at its May 17 annual meeting.

Pershing and CP are locked in a proxy battle over who shouldlead CP. Pershing says CP CEO Fred Green should be replaced,ideally by former Canadian National Railway CEO HunterHarrison. CP says Green has a turnaround plan for the railroad.

But in a note to clients, Glass Lewis & Co advised itsclients to back CP's entire slate of seven nominees and to voteagainst re-electing CP's Chairman John Cleghorn and Green asdirectors.

"We believe the company's serial underperformance from atotal shareholder return perspective and its industry-worstoperating performance require a far-reaching overhaul of theboard and senior management" it said.

The proxy firms advise large institutional investors aheadof shareholder votes, and their reports can shift votes for oragainst management in proxy battles.

Egan-Jones took the same approach. "We believe that votingon the dissidents' ballot for the dissidents' nominees is in thebest interest of the company and its shareholders," it said.

Earlier this week, Ontario Teachers' Pension Fund, a largeCanadian Pacific shareholder, also said it would vote forAckman's slate instead of the incumbent board.